Find the next number in the sequence

5 12 24 36 ?

I look at you, you look at me I raise my right, you raise your left. What am I?

You are given a set of weighing scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

What occurs twice in a week, once in a year but never in a day?

In which direction should the missing arrow point?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

How can you tell a raw egg from a hard-boiled egg?

A man was just doing his job when his suit was torn. Why did he die three minutes later?